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k1 = 1/2 x 2 x 22/7 x 1,4
= 22 x 0,2
= 4,4 m
k2 = 1/2 x 22/7 x 0,7
= 22 x 0,1
= 2,2
kliling = 4,4 + 2,2
= 6,6 cm jawabn B
soal nomer 16
k1 = 1/2 x2 x 22/7 x 14
= 22 x 2
= 44
k2 = 2 x 22/7 x 3,5
= 2 x 22/2
= 22
kliling = 22 + 44
= 66 jawabnnya B
Karsir=1/2K lingkaran A +K lingkaran B +
Karsir=1/2(phi x d) + (phi x d)
Karsir=1/2(22/7 x 28) + (22/7 x14)
Karsir=1/2(88) +44
Karsir=44+44=88cm